(- the square of 4A / 3, the square of B) (3a / 2 + ab-3b / 5) divided by (the square of 4A / 3, the square of B)

(- the square of 4A / 3, the square of B) (3a / 2 + ab-3b / 5) divided by (the square of 4A / 3, the square of B)

-4/3a²b²(3/2a²+ab-3/5b²)÷4/3a²b²
=(-4/3a²b²÷4/3a²b²(3/2a²+ab-3/5b²)
=-(3/2a²+ab-3/5b²)
=-3/2a²-ab+3/5b²

If the square of a = 3A, then a = 3,

No, there's another value, a = 0. Add: the square of a = 3AA - 3A = 0A * (A-3) = 0a1 = 0, A2 = 3

How to calculate the square of 9-3a + a - 19 = 0

a^2-3a-10=0
(a+2)(a-5)=0
a=-2 or a=5

How many times trinomial is 3 square B of polynomial-a plus 3 square-9 of 3A?

I can't understand your question. I can't be 100% sure. It seems to be (3) times (3) items

The following formulas are given: 32-12 = 8 = 8 × 1, 52-32 = 16 = 8 × 2, 72-52 = 24 = 8 × 3, 92-72 = 32 = 8 × 4 If you look at the above series of formulas, what rules can you find? Express this rule with algebraic formula

According to the analysis: (2n + 1) 2 - (2n-1) 2 = 8 × n

Minus one half plus six fifths minus seven twelfth plus nine twentieth minus eleven thirties plus thirteen forty-two minus fifteen fifty-six plus seventeen seventy-two

Minus one half plus six fifths minus seven twelfth plus nine twentieth minus eleven thirties plus thirteen forty-two minus fifteen fifty-six plus seventeen seventy-two
=-1/2+1/2+1/3-1/3-1/4+1/4+1/5-1/5-1/6+1/6+1/7-1/7-1/8+1/8+1/9
=1/9

As shown in the figure, the length of the rectangle is 15 cm and the width is 8 cm measured on the drawing with the scale of 1:500. Please calculate the actual area of the shadow part in square meters?

15 / 1500 = 7500 (CM) = 75 (m), 8 / 1500 = 4000 (CM) = 40 (m), 75 × 40 / 2 = 1500 (M2); a: the actual area of the shadow is 1500 m2

1-(10/21-3/14) 3/8+(11/12-7/20) 2/3-7/12+4/5 x-3/8-1/8=11/18 2/3-x-1/4=1/3 2x-6/7=1/7
7 / 9-x + 5 / 6 = 1 and 5 / 18 x + 5 / 12 = 1 / 2 + 5 / 9 to pass

1-(10/21-3/14) =1-(20/42-9/42)=1-11/42=31/423/8+(11/12-7/20)=3/8+55/60-21/60=3/8+34/60=3/8+17/30=45/120+68/120=113/1202/3-7/12+4/5 =8/12-7/12+4/5=1/12+4/5=5/60+48/60=53/60x-3/8-1/8=11/18x=11/18+1/2=11...

A semicircular flower bed with a radius of 10 cm. How many centimeters is its perimeter and how many square centimeters is its area

Perimeter = 10 × 3.14 + 10 × 2 = 51.4cm
Area = 10 × 10 × 3.14 × 1 / 2 = 157 square centimeter

Simple calculation of 77 + 2.7 + 2.3 + 25

77+10+25=87+25=112